diff --git a/ElectronClient/app/InteropServiceHelper.js b/ElectronClient/app/InteropServiceHelper.js
index 341a19c16..de2f367c4 100644
--- a/ElectronClient/app/InteropServiceHelper.js
+++ b/ElectronClient/app/InteropServiceHelper.js
@@ -11,7 +11,7 @@ class InteropServiceHelper {
 
 		if (module.target === 'file') {
 			path = bridge().showSaveDialog({
-				filters: [{ name: module.description, extensions: [module.fileExtension]}]
+				filters: [{ name: module.description, extensions: module.fileExtension}]
 			});
 		} else {
 			path = bridge().showOpenDialog({
diff --git a/ElectronClient/app/app.js b/ElectronClient/app/app.js
index 239571d5d..46264d96a 100644
--- a/ElectronClient/app/app.js
+++ b/ElectronClient/app/app.js
@@ -285,7 +285,7 @@ class Application extends BaseApplication {
 
 							if (moduleSource === 'file') {
 								path = bridge().showOpenDialog({
-									filters: [{ name: module.description, extensions: [module.fileExtension]}]
+									filters: [{ name: module.description, extensions: module.fileExtensions}]
 								});
 							} else {
 								path = bridge().showOpenDialog({
diff --git a/ReactNativeClient/lib/services/InteropService.js b/ReactNativeClient/lib/services/InteropService.js
index 28802fcfb..7e47a05ca 100644
--- a/ReactNativeClient/lib/services/InteropService.js
+++ b/ReactNativeClient/lib/services/InteropService.js
@@ -27,12 +27,12 @@ class InteropService {
 		let importModules = [
 			{
 				format: 'jex',
-				fileExtension: 'jex',
+				fileExtensions: ['jex'],
 				sources: ['file'],
 				description: _('Joplin Export File'),
 			}, {
 				format: 'md',
-				fileExtension: 'md',
+				fileExtensions: ['md', 'markdown'],
 				sources: ['file', 'directory'],
 				isNoteArchive: false, // Tells whether the file can contain multiple notes (eg. Enex or Jex format)
 				description: _('Markdown'),
@@ -42,7 +42,7 @@ class InteropService {
 				description: _('Joplin Export Directory'),
 			}, {
 				format: 'enex',
-				fileExtension: 'enex',
+				fileExtensions: ['enex'],
 				sources: ['file'],
 				description: _('Evernote Export File'),
 			},
@@ -51,7 +51,7 @@ class InteropService {
 		let exportModules = [
 			{
 				format: 'jex',
-				fileExtension: 'jex',
+				fileExtensions: ['jex'],
 				target: 'file',
 				description: _('Joplin Export File'),
 			}, {
@@ -108,7 +108,9 @@ class InteropService {
 		const module = this.moduleByFormat_(type, format);
 		if (!module) throw new Error(_('Cannot load "%s" module for format "%s"', type, format));
 		const ModuleClass = require(module.path);
-		return new ModuleClass();
+		const output = new ModuleClass();
+		output.setMetadata(module);
+		return output;
 	}
 
 	moduleByFileExtension_(type, ext) {
@@ -119,7 +121,7 @@ class InteropService {
 		for (let i = 0; i < modules.length; i++) {
 			const m = modules[i];
 			if (type !== m.type) continue;
-			if (m.fileExtension === ext) return m;
+			if (m.fileExtensions.indexOf(ext) >= 0) return m;
 		}
 
 		return null;
diff --git a/ReactNativeClient/lib/services/InteropService_Exporter_Base.js b/ReactNativeClient/lib/services/InteropService_Exporter_Base.js
index 6d0ba2bb0..14b1e147b 100644
--- a/ReactNativeClient/lib/services/InteropService_Exporter_Base.js
+++ b/ReactNativeClient/lib/services/InteropService_Exporter_Base.js
@@ -5,6 +5,14 @@ class InteropService_Exporter_Base {
 	async processResource(resource, filePath) {}
 	async close() {}
 
+	setMetadata(md) {
+		this.metadata_ = md;
+	}
+
+	metadata() {
+		return this.metadata_;
+	}
+
 	async temporaryDirectory_(createIt) {
 		const md5 = require('md5');
 		const tempDir = require('os').tmpdir() + '/' + md5(Math.random() + Date.now());
diff --git a/ReactNativeClient/lib/services/InteropService_Importer_Base.js b/ReactNativeClient/lib/services/InteropService_Importer_Base.js
index 6076cd6be..12c603d01 100644
--- a/ReactNativeClient/lib/services/InteropService_Importer_Base.js
+++ b/ReactNativeClient/lib/services/InteropService_Importer_Base.js
@@ -1,5 +1,13 @@
 class InteropService_Importer_Base {
 
+	setMetadata(md) {
+		this.metadata_ = md;
+	}
+
+	metadata() {
+		return this.metadata_;
+	}
+
 	async init(sourcePath, options) {
 		this.sourcePath_ = sourcePath;
 		this.options_ = options;
diff --git a/ReactNativeClient/lib/services/InteropService_Importer_Md.js b/ReactNativeClient/lib/services/InteropService_Importer_Md.js
index 86764b049..49ab0a342 100644
--- a/ReactNativeClient/lib/services/InteropService_Importer_Md.js
+++ b/ReactNativeClient/lib/services/InteropService_Importer_Md.js
@@ -21,12 +21,14 @@ class InteropService_Importer_Md extends InteropService_Importer_Base {
 	async exec(result) {
 		let parentFolderId = null;
 
+		const supportedFileExtension = this.metadata().fileExtensions;
+
 		const filePaths = [];
 		if (await shim.fsDriver().isDirectory(this.sourcePath_)) {
 			const stats = await shim.fsDriver().readDirStats(this.sourcePath_);
 			for (let i = 0; i < stats.length; i++) {
 				const stat = stats[i];
-				if (fileExtension(stat.path).toLowerCase() === 'md') {
+				if (supportedFileExtension.indexOf(fileExtension(stat.path).toLowerCase()) >= 0) {
 					filePaths.push(this.sourcePath_ + '/' + stat.path);
 				}
 			}